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NGC 6811 The Hole in the Cluster, 




    

        Jirair Afarian
NGC 6811 The Hole in the Cluster

NGC 6811 The Hole in the Cluster

Technical card

Resolution: 5423x3636

Dates: May 15, 2018

Frames: Badaar Moon and SkyGlow Badaar: 6x300" (gain: 11.00) bin 1x1

Integration: 0.5 hours

Darks: ~10

Flats: ~20

Bias: ~50

Avg. Moon age: 0.00 days

Avg. Moon phase: 0.00%

Bortle Dark-Sky Scale: 6.00

Mean FWHM: 7.00

Temperature: 13.00

Astrometry.net job: 2062867

RA center: 294.044 degrees

DEC center: 46.417 degrees

Pixel scale: 0.783 arcsec/pixel

Orientation: 206.935 degrees

Field radius: 0.710 degrees

Locations: Home Observatory, Newmarket, Ontario, Canada

Data source: Unknown

Description

NGC 6811 is an open cluster in the constellation of Cygnus, near the constellation of Lyra. It has an angular size half that of the full Moon and includes about 1000 stars of roughly similar magnitude. It has also been called "The Hole in the Cluster" because of its dark center. It is 14–20 light years across, and has a total luminosity of 2100 suns. Approximately 1.00 ± 0.17 billion years old, it probably contained some 6000 stars at birth, but gravitational interactions and stellar evolution have since reduced the number to 1000.

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Jir11
Jirair Afarian
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        Jirair Afarian
    Original
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    NGC 6811 The Hole in the Cluster, 




    

        Jirair Afarian
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NGC 6811 The Hole in the Cluster, 




    

        Jirair Afarian